# A001624 (b-file synthesized from sequence entry)
2 1
3 5
4 58
5 1274
6 41728
7 1912112
8 116346400
9 9059742176
10 877746364288
11 103483282967936
12 14581464284095744
13 2419278174185319680
14 466730664414683625472
15 103580258158369503481856
16 26198788829773597178540032